AMC VersaTox, Инструкция по эксплуатации

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Note:
The calibration procedure may cause false alarm and/or signal loss to the monitor.
Appropriate precautions may be required.
Refer to Figure 5.1 to perform the following calibration procedure:
1) Remove cover from transmitter housing.
2) Plug in “clip on” type test leads fully into jacks on multi-meter and clip onto the edge
of the transmitter board on the test points COM TP11 and SIG TP12 as shown in
figure.
3) Switch-ON multi-meter and select DC volts range to read greater than 1.00 VDC.
4) Cover the sides of sensor with a clean cloth or similar to prevent a draft on the
sensor.
5) Apply a Zero gas sample or with the sensor in clean air, with a calibration adapter
cup firmly and completely over the sensor opening on side of AMC-VersaTox for 2
minutes with a flow rate of 0.5 to 1 liters per minute.
6) After 2 minutes adjust the Zero trimmer for a stabilized zero reading of 0.00 VDC
measured at the test points (TP11, TP12.) see Figure 5-1 (except oxygen).
7) Unplug test leads and connect “Remote Calibration Lead” to multi-meter. The
BLACK lead to negative or common (-) and the RED lead to positive (+)
8) Insert plug end of “Remote Calibration Lead” fully into CAL jack on the transmitter.
9) Select DC milliamp range on the multi-meter to read greater than 20 mA full scale.
10) Apply the Span gas sample, with a calibration adapter cup firmly and completely over
the sensor opening on side of AMC-VersaTox for 2 minutes with a flow rate of 0.5 to
1 liters per minute. The span gas sample need not be the full scale concentration but
could be a fraction of this. Since the transmitter output range is 4-20 mA, a full scale
concentration should register 20 mA after a few moments exposure. A half scale
concentration, accordingly, should provide 12 mA and so on.
11) After 2 minutes adjust the Span trimmer for the correct Span current reading.